[RESEND PATCH 2/2] OMAP3: igep0020: Add support for Micron NAND Flash storage memory

[Javier Martinez Canillas]

On Wed, Apr 25, 2012 at 10:00 AM, Enric Balletbò i Serra
<eballetbo at gmail.com> wrote:
> 2012/4/4 Javier Martinez Canillas <javier at dowhile0.org>:
>> IGEP-based boards can have two different flash memories, a OneNAND or
>> a NAND device. The boot configuration pins (sys_boot) are used to
>> specify which memory is available.
>>
>> Also, this patch removes unnecesary code for registering the OneNAND.
>>
>> Signed-off-by: Javier Martinez Canillas <javier at dowhile0.org>
>> ---
>>  arch/arm/mach-omap2/board-igep0020.c |   75 ++++++++++++++--------------------
>>  1 files changed, 31 insertions(+), 44 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c
>> index 930c0d3..4af615a 100644
>> --- a/arch/arm/mach-omap2/board-igep0020.c
>> +++ b/arch/arm/mach-omap2/board-igep0020.c
>> @@ -24,6 +24,8 @@
>>  #include <linux/i2c/twl.h>
>>  #include <linux/mmc/host.h>
>>
>> +#include <linux/mtd/nand.h>
>> +
>>  #include <asm/mach-types.h>
>>  #include <asm/mach/arch.h>
>>
>> @@ -39,6 +41,8 @@
>>  #include "hsmmc.h"
>>  #include "sdram-numonyx-m65kxxxxam.h"
>>  #include "common-board-devices.h"
>> +#include "board-flash.h"
>> +#include "control.h"
>>
>>  #define IGEP2_SMSC911X_CS       5
>>  #define IGEP2_SMSC911X_GPIO     176
>> @@ -60,6 +64,10 @@
>>  #define IGEP3_GPIO_LED1_RED    16
>>  #define IGEP3_GPIO_USBH_NRESET  183
>>
>> +#define IGEP_SYSBOOT_MASK           0x1f
>> +#define IGEP_SYSBOOT_NAND           0x0f
>> +#define IGEP_SYSBOOT_ONENAND        0x10
>> +
>>  /*
>>  * IGEP2 Hardware Revision Table
>>  *
>> @@ -110,8 +118,10 @@ static void __init igep2_get_revision(void)
>>        gpio_free(IGEP2_GPIO_LED1_RED);
>>  }
>>
>> -#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
>> -       defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
>> +#if defined(CONFIG_MTD_ONENAND_OMAP2) ||               \
>> +       defined(CONFIG_MTD_ONENAND_OMAP2_MODULE) ||     \
>> +       defined(CONFIG_MTD_NAND_OMAP2) ||               \
>> +       defined(CONFIG_MTD_NAND_OMAP2_MODULE)
>>
>>  #define ONENAND_MAP             0x20000000
>>
>> @@ -123,7 +133,7 @@ static void __init igep2_get_revision(void)
>>  * So MTD regards it as 4KiB page size and 256KiB block size 64*(2*2048)
>>  */
>>
>> -static struct mtd_partition igep_onenand_partitions[] = {
>> +static struct mtd_partition igep_flash_partitions[] = {
>>        {
>>                .name           = "X-Loader",
>>                .offset         = 0,
>> @@ -151,50 +161,27 @@ static struct mtd_partition igep_onenand_partitions[] = {
>>        },
>>  };
>>
>> -static struct omap_onenand_platform_data igep_onenand_data = {
>> -       .parts = igep_onenand_partitions,
>> -       .nr_parts = ARRAY_SIZE(igep_onenand_partitions),
>> -       .dma_channel    = -1,   /* disable DMA in OMAP OneNAND driver */
>> -};
>> -
>> -static struct platform_device igep_onenand_device = {
>> -       .name           = "omap2-onenand",
>> -       .id             = -1,
>> -       .dev = {
>> -               .platform_data = &igep_onenand_data,
>> -       },
>> -};
>> +static inline u32 igep_get_sysboot_value(void)
>> +{
>> +       return omap_ctrl_readl(OMAP343X_CONTROL_STATUS) & IGEP_SYSBOOT_MASK;
>> +}
>>
>>  static void __init igep_flash_init(void)
>>  {
>> -       u8 cs = 0;
>> -       u8 onenandcs = GPMC_CS_NUM + 1;
>> -
>> -       for (cs = 0; cs < GPMC_CS_NUM; cs++) {
>> -               u32 ret;
>> -               ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
>> -
>> -               /* Check if NAND/oneNAND is configured */
>> -               if ((ret & 0xC00) == 0x800)
>> -                       /* NAND found */
>> -                       pr_err("IGEP: Unsupported NAND found\n");
>> -               else {
>> -                       ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
>> -                       if ((ret & 0x3F) == (ONENAND_MAP >> 24))
>> -                               /* ONENAND found */
>> -                               onenandcs = cs;
>> -               }
>> -       }
>> -
>> -       if (onenandcs > GPMC_CS_NUM) {
>> -               pr_err("IGEP: Unable to find configuration in GPMC\n");
>> -               return;
>> -       }
>> -
>> -       igep_onenand_data.cs = onenandcs;
>> -
>> -       if (platform_device_register(&igep_onenand_device) < 0)
>> -               pr_err("IGEP: Unable to register OneNAND device\n");
>> +       u32 mux;
>> +       mux = igep_get_sysboot_value();
>> +
>> +       if (mux == IGEP_SYSBOOT_NAND) {
>> +               pr_info("IGEP: initializing NAND memory device\n");
>> +               board_nand_init(igep_flash_partitions,
>> +                               ARRAY_SIZE(igep_flash_partitions),
>> +                               0, NAND_BUSWIDTH_16);
>> +       } else if (mux == IGEP_SYSBOOT_ONENAND) {
>> +               pr_info("IGEP: initializing OneNAND memory device\n");
>> +               board_onenand_init(igep_flash_partitions,
>> +                                  ARRAY_SIZE(igep_flash_partitions), 0);
>> +       } else
>> +               pr_err("IGEP: Flash: unsupported sysboot sequence found\n");
>>  }
>>
>>  #else
>> --
>> 1.7.7.6
>>
>
> Seems good to me.
>
> Tony, as this is a fix ,may be included ?
>
> Acked-by: Enric Balletbo i Serra <eballetbo at gmail.com>
> Tested-by: Enric Balletbo i Serra <eballetbo at gmail.com>
>
> Cheers,
>    Enric
> --

Tony,

Can you please merge this patch and:

[RESEND PATCH 1/2] ARM: OMAP2+: nand: Make board_onenand_init()
visible to board code

I've sent this two patches several times and no one is against them. I
also had positive feedback such as Enric's acked-by

These two patches are a fix and needed to boot newer versions of the
IGEPv2 board. Without the patches the board doesn't even boot.

Please tell me if you need me to resend the patches.

Best regards,

-- 
Javier Martínez Canillas
(+34) 682 39 81 69
Barcelona, Spain